diff options
| -rw-r--r-- | drivers/scsi/ips.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c index 0a252e7aca6..749c95bb7df 100644 --- a/drivers/scsi/ips.c +++ b/drivers/scsi/ips.c @@ -355,6 +355,9 @@ static int ips_init_phase2(int index); static int ips_init_phase1(struct pci_dev *pci_dev, int *indexPtr); static int ips_register_scsi(int index); +static int ips_poll_for_flush_complete(ips_ha_t * ha); +static void ips_flush_and_reset(ips_ha_t *ha); + /* * global variables */ @@ -4830,6 +4833,9 @@ ips_isinit_morpheus(ips_ha_t * ha) uint32_t bits; METHOD_TRACE("ips_is_init_morpheus", 1); + + if (ips_isintr_morpheus(ha)) + ips_flush_and_reset(ha); post = readl(ha->mem_ptr + IPS_REG_I960_MSG0); bits = readl(ha->mem_ptr + IPS_REG_I2O_HIR); @@ -4844,6 +4850,93 @@ ips_isinit_morpheus(ips_ha_t * ha) /****************************************************************************/ /* */ +/* Routine Name: ips_flush_and_reset */ +/* */ +/* Routine Description: */ +/* */ +/* Perform cleanup ( FLUSH and RESET ) when the adapter is in an unknown */ +/* state ( was trying to INIT and an interrupt was already pending ) ... */ +/* */ +/****************************************************************************/ +static void +ips_flush_and_reset(ips_ha_t *ha) +{ + ips_scb_t *scb; + int ret; + int time; + int done; + dma_addr_t command_dma; + + /* Create a usuable SCB */ + scb = pci_alloc_consistent(ha->pcidev, sizeof(ips_scb_t), &command_dma); + if (scb) { + memset(scb, 0, sizeof(ips_scb_t)); + ips_init_scb(ha, scb); + scb->scb_busaddr = command_dma; + + scb->timeout = ips_cmd_timeout; + scb->cdb[0] = IPS_CMD_FLUSH; + + scb->cmd.flush_cache.op_code = IPS_CMD_FLUSH; + scb->cmd.flush_cache.command_id = IPS_MAX_CMDS; /* Use an ID that would otherwise not exist */ + scb->cmd.flush_cache.state = IPS_NORM_STATE; + scb->cmd.flush_cache.reserved = 0; + scb->cmd.flush_cache.reserved2 = 0; + scb->cmd.flush_cache.reserved3 = 0; + scb->cmd.flush_cache.reserved4 = 0; + + ret = ips_send_cmd(ha, scb); /* Send the Flush Command */ + + if (ret == IPS_SUCCESS) { + time = 60 * IPS_ONE_SEC; /* Max Wait time is 60 seconds */ + done = 0; + + while ((time > 0) && (!done)) { + done = ips_poll_for_flush_complete(ha); + /* This may look evil, but it's only done during extremely rare start-up conditions ! */ + udelay(1000); + time--; + } + } + } + + /* Now RESET and INIT the adapter */ + (*ha->func.reset) (ha); + + pci_free_consistent(ha->pcidev, sizeof(ips_scb_t), scb, command_dma); + return; +} + +/****************************************************************************/ +/* */ +/* Routine Name: ips_poll_for_flush_complete */ +/* */ +/* Routine Description: */ +/* */ +/* Poll for the Flush Command issued by ips_flush_and_reset() to complete */ +/* All other responses are just taken off the queue and ignored */ +/* */ +/****************************************************************************/ +static int +ips_poll_for_flush_complete(ips_ha_t * ha) +{ + IPS_STATUS cstatus; + + while (TRUE) { + cstatus.value = (*ha->func.statupd) (ha); + + if (cstatus.value == 0xffffffff) /* If No Interrupt to process */ + break; + + /* Success is when we see the Flush Command ID */ + if (cstatus.fields.command_id == IPS_MAX_CMDS ) + return 1; + } + + return 0; + +/****************************************************************************/ +/* */ /* Routine Name: ips_enable_int_copperhead */ /* */ /* Routine Description: */ |